为研究平朔矿区煤中煤灰行为特性,为微量元素污染控制提供依据,采用反射偏光显微镜和扫描电镜等手段,对平朔矿区4号煤层中黏土矿物、铝的氢氧化物矿物、方解石、菱铁矿和黄铁矿等矿物的分布和赋存特征进行了研究,同时深入分析了平朔矿区煤中黏土矿物中分散矿物及微量元素的分布特征,以及各种矿物之间的共生、交代作用。研究表明,平朔矿区煤中的黏土矿物主要呈现2种不同的光学性质,但2种黏土矿物中的Si/Al原子比相近,矿物成分差别不大,均以高岭石黏土矿物为主;铝的氢氧化物矿物是平朔二叠纪煤中有代表性的矿物类型,在其他地区煤中比较少见,是煤灰中Al2O3的重要来源,且与方解石、黄铁矿等矿物密切共生。

In order to study the ash behavior features of coal in Pingshuo Mining Area and to provide the basis to the pollution control of the trace elements, a refle cted-light microscope, scanning electron microscope and other means were applied to study the distribution and deposition features of the clay mineral, aluminium hydr oxide mineral, calcite, siderite, pyrite and other minerals in No.4 coal seam of Pingshuo Mining Area.The paper also had a deep analysis on the distribution features of t he dispersed minerals and trace elements in the clay mineral in coal of Pingshuo Mining Area as well as the paragenetic and metasomatism function between each min eral.The study showed that the clay mineral in coal of Pingshuo Mining Area mainly would have two different optical properties.The Si/Al atomic ratio in two clay mineral s was close and there was a small difference in the mineral composition. The kaolinite was the mineral mainly in the composition of the clay.The aluminium hydroxide mi neral was the typical mineral type in Permian coal of Pingshuo Mining Area.In comparison with coal in other areas, AI2O3 was the important sources in the ash and had a close paragenetic with calcite, pyrite and other minerals.